Texas Instruments TI-89 User Manual - Page 333
Finding a Zero, Minimum, or Maximum within an Interval
UPC - 033317196326
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You can also display function coordinates by tracing the function (...), typing an x value, and pressing ¸. Finding a Zero, Minimum, or Maximum within an Interval 1. From the Graph screen, press ‡ and select 2:Zero, 3:Minimum, or 4:Maximum. 2. As necessary, use D and C to select the applicable function. Note: Typing x values is a quick way to set bounds. 3. Set the lower bound for x. Either use A and B to move the cursor to the lower bound or type its x value. 4. Press ¸. A 4 at the top of the screen marks the lower bound. 5. Set the upper bound, and press ¸. The cursor moves to the solution, and its coordinates are displayed. Finding the Intersection of Two Functions within an Interval 1. From the Graph screen, press ‡ and select 5:Intersection. 2. Select the first function, using D or C as necessary, and press ¸. The cursor moves to the next graphed function. 3. Select the second function, and press ¸. 4. Set the lower bound for x. Either use A and B to move the cursor to the lower bound or type its x value. Basic Function Graphing 333